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Kernel: Propagate errors in StorageController reset() and shutdown()

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These used to signal an error with a boolean return type. We now return
a sensible errno instead.
This commit is contained in:
Julian Offenhäuser 2023-03-14 14:11:31 +01:00 • committed by Andreas Kling
parent 9927dab993
commit d1e88a5141
9 changed files with 45 additions and 46 deletions
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41
Kernel/Storage/NVMe/NVMeController.cpp
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@ -87,13 +87,13 @@ bool NVMeController::wait_for_ready(bool expected_ready_bit_value)
return true;
}
bool NVMeController::reset_controller()
ErrorOr<void> NVMeController::reset_controller()
{
if ((m_controller_regs->cc & (1 << CC_EN_BIT)) != 0) {
// If the EN bit is already set, we need to wait
// until the RDY bit is 1, otherwise the behavior is undefined
if (!wait_for_ready(true))
return false;
return Error::from_errno(ETIMEDOUT);
}
auto cc = m_controller_regs->cc;
@ -106,18 +106,18 @@ bool NVMeController::reset_controller()
// Wait until the RDY bit is cleared
if (!wait_for_ready(false))
return false;
return Error::from_errno(ETIMEDOUT);
return true;
return {};
}
bool NVMeController::start_controller()
ErrorOr<void> NVMeController::start_controller()
{
if (!(m_controller_regs->cc & (1 << CC_EN_BIT))) {
// If the EN bit is not already set, we need to wait
// until the RDY bit is 0, otherwise the behavior is undefined
if (!wait_for_ready(false))
return false;
return Error::from_errno(ETIMEDOUT);
}
auto cc = m_controller_regs->cc;
@ -132,9 +132,9 @@ bool NVMeController::start_controller()
// Wait until the RDY bit is set
if (!wait_for_ready(true))
return false;
return Error::from_errno(ETIMEDOUT);
return true;
return {};
}
UNMAP_AFTER_INIT u32 NVMeController::get_admin_q_dept()
@ -232,19 +232,16 @@ size_t NVMeController::devices_count() const
return m_device_count;
}
bool NVMeController::reset()
ErrorOr<void> NVMeController::reset()
{
if (!reset_controller())
return false;
if (!start_controller())
return false;
return true;
TRY(reset_controller());
TRY(start_controller());
return {};
}
bool NVMeController::shutdown()
ErrorOr<void> NVMeController::shutdown()
{
TODO();
return false;
return Error::from_errno(ENOTIMPL);
}
void NVMeController::complete_current_request([[maybe_unused]] AsyncDeviceRequest::RequestResult result)
@ -261,9 +258,10 @@ UNMAP_AFTER_INIT ErrorOr<void> NVMeController::create_admin_queue(Optional<u8> i
Vector<NonnullRefPtr<Memory::PhysicalPage>> sq_dma_pages;
auto cq_size = round_up_to_power_of_two(CQ_SIZE(qdepth), 4096);
auto sq_size = round_up_to_power_of_two(SQ_SIZE(qdepth), 4096);
if (!reset_controller()) {
auto maybe_error = reset_controller();
if (maybe_error.is_error()) {
dmesgln_pci(*this, "Failed to reset the NVMe controller");
return EFAULT;
return maybe_error;
}
{
auto buffer = TRY(MM.allocate_dma_buffer_pages(cq_size, "Admin CQ queue"sv, Memory::Region::Access::ReadWrite, cq_dma_pages));
@ -283,9 +281,10 @@ UNMAP_AFTER_INIT ErrorOr<void> NVMeController::create_admin_queue(Optional<u8> i
m_controller_regs->acq = reinterpret_cast<u64>(AK::convert_between_host_and_little_endian(cq_dma_pages.first()->paddr().as_ptr()));
m_controller_regs->asq = reinterpret_cast<u64>(AK::convert_between_host_and_little_endian(sq_dma_pages.first()->paddr().as_ptr()));
if (!start_controller()) {
maybe_error = start_controller();
if (maybe_error.is_error()) {
dmesgln_pci(*this, "Failed to restart the NVMe controller");
return EFAULT;
return maybe_error;
}
set_admin_queue_ready_flag();
m_admin_queue = TRY(NVMeQueue::try_create(0, irq, qdepth, move(cq_dma_region), cq_dma_pages, move(sq_dma_region), sq_dma_pages, move(doorbell_regs)));